Gearbox
Please note: part numbers coloured black are unlinked, which means we cannot supply them. These part numbers are provided for reference only.
Key | Part Number | Description | Per | Models |
NI | 2c-3/8″ | Layshaft coupling nut (slotted) | 2 | 1948 |
NI | 89-3002 | Gearbox case, with fixed fittings | 1 | 1948 |
NI | 89-3153 | Pawl plate and fulcrum boss, assembled | 1 | 1948 |
NI | 89-3220 | Speedo drive take-off assembly | 1 | 1948 |
1 | 89-3180 | Pedal return spring | 1 | All |
2 | 89-3104 | Gearbox side plate bush | 1 | 1949-56 S7 & S8 |
3 | 02-0522 | 3/8 spring washer, stainless steel | 1 | 1949-56 S7 & S8 |
3 | K51a | Spring washer 3/8 | 1 | 1948 |
4 | 89-0393 | Nut | 1 | All |
5 | 89-3102 | Gearbox side plate with fixed fittings | 1 | All |
6 | 02-0923 | Washer | 1 | 1949-56 S7 & S8 |
6 | 15-5155 | Washer, handlebar clip and big end – stainless steel | 1 | 1948 |
7 | 89-0394 | Nut, 5/16″ BSF | 1 | All |
8 | 89-3200 | Screw, gearbox side plate | 8 | All |
9 | 89-3013 | Dowel, gearbox side plate | 3 | 1949-56 S7 & S8 |
10 | 89-3015 | Stud, rear mounting plate | 2 | 1949-56 S7 & S8 |
10 | 89-3105 | Stud, gearbox side plate | 2 | 1948 |
11 | 89-3172 | Detent plunger housing | 1 | All |
12 | 21-5302 | Nut, detent plunger housing | 2 | All |
13 | 89-3174 | Locking wire | 1 | 1949-56 S7 & S8 |
14 | 89-3171 | Detent plunger spring | 1 | All |
15 | 89-3170 | Detent plunger | 1 | All |
16 | 89-3224 | Pin, speedo driving pinion | 1 | All |
17 | 89-3067 | Speedo drive pinion (sidecar ratio) | 1 | 1949-56 S7 & S8 (sidecar ratio) |
17 | 89-3223 | Speedo drive pinion (solo ratio) | 1 | All |
18 | 89-0163 | Gasket, speedo drive | 1 | All |
19 | 89-3221 | Speedo drive sleeve | 1 | 1948 |
19 | 89-3226 | Speedo drive sleeve | 1 | 1949-56 S7 & S8 |
20 | 02-0525 | 1/4 plain washer | 2 | 1949-56 S7 & S8 |
21 | 21-6090 | Set screw, speedo drive | 2 | 1949-56 S7 & S8 |
22 | 89-3222 | Spindle, speedo drive | 1 | All |
23 | 89-3229 | Inspection cover | 1 | 1948 |
23 | 89-3234 | Inspection cover | 1 | 1949-56 S7 & S8 |
24 | 27-4401 | Sleeve nut, gearbox cover and chain adjuster lock nut | 2 | 1949-56 S7 & S8 |
24 | 89-3225 | Nut, speedo driving pinion | 2 | 1948 |
25 | 02-0525 | 1/4 plain washer | 2 | 1949-56 S7 & S8 |
26 | 89-3230 | Gasket, inspection cover | 1 | All |
27 | 89-3012 | Stud, inspection cover | 2 | 1949-56 S7 & S8 |
27 | 89-3012 | Stud, inspection cover | 4 | 1948 |
28 | 89-3039 | Retaining circlip, kickstart ratchet | 2 | All |
29 | 89-3040 | Kickstart ratcher | 1 | 1948 |
29 | 89-3046 | Kickstart ratchet | 1 | 1949-56 S7 & S8 |
30 | 89-3035 | Kickstart worm and bush assembly | 1 | 1948 |
30 | 89-3044 | Kickstart worm and bush assembly | 1 | 1949-56 S7 & S8 |
31 | 89-3037 | Bush, kickstart worm | 1 | 1949-56 S7 & S8 |
32 | 89-3038 | Spring, kickstart worm | 1 | All |
33 | 89-3004 | Cup, mainshaft bearing | 1 | 1949-56 S7 & S8 |
34 | 89-3034 | Mainshaft thrust washer | 1 | All |
35 | 89-3023 | Bearing, 3/4×1 7/8×9/16 | 1 | All |
36 | 89-3030 | Gearbox mainshaft, complete | A | 1948 |
36 | 89-3031 | Gearbox mainshaft | 1 | All |
37 | 89-0149 | Key | 1 | 1948 |
37 | 89-0149 | Key | 2 | 1949-56 S7 & S8 |
38 | 89-3032 | Mainshaft gear, 3rd speed | 1 | All |
39 | 89-3024 | Mainshaft oil seal | 1 | All |
40 | 89-3022 | Wheel bearing, sealed 1×2 1/4×5/8 | 1 | All |
41 | 89-3033 | Mainshaft gear, 4th speed | 1 | 1949-56 S7 & S8 |
42 | 89-3064 | Oil baffle plate | 1 | All |
43 | 89-3065 | Bolt, oil baffle plate | 2 | All |
44 | 89-3174 | Locking wire | 1 | 1949-56 S7 & S8 |
45 | 89-0309 | Stud, gearbox front cover plate | 8 | 1948 |
45 | 89-0394 | Nut, 5/16″ BSF | 8 | All |
46 | 89-3075 | Locking strip | 4 | All |
47 | 89-3020 | Front cover plate complete | 1 | 1948 |
47 | 89-3027 | Front cover plate complete | 1 | 1949-56 S7 & S8 |
48 | 89-3026 | Gasket, front cover plate | 1 | All |
49 | 89-3168 | Retaining circlip, cam plate | 1 | 1949-56 S7 & S8 |
50 | 89-3071 | Selector fork guide bar | 1 | 1949-56 S7 & S8 |
51 | 89-3073 | Selector fork, straight | 1 | 1949-56 S7 & S8 |
52 | 89-3074 | Selector fork, cranked | 1 | 1949-56 S7 & S8 |
53 | 89-3016 | Gearbox connecting stud | 8 | 1949-56 S7 & S8 |
54 | 89-3011 | Gearbox connecting dowel | 1 | 1949-56 S7 & S8 |
55 | 89-3252 | Nut | 4 | 1948 |
55 | 89-3255 | Nut | 5 | 1949-56 S7 & S8 |
56 | 01-1804 | Plain washer, 3/8 | 5 | 1949-56 S7 & S8 |
57 | 89-3250 | Bell housing vent cover | 1 | All |
58 | 21-6090 | Screw, bell housing vent cover | 2 | 1949-56 S7 & S8 |
58 | 89-3251 | Stud, bell housing vent cover | 2 | 1948 |
59 | 02-0525 | 1/4 plain washer | 2 | 1949-56 S7 & S8 |
60 | 89-3184 | Gear indicator sleeve complete | 1 | All |
61 | 89-3181 | Pedal shaft complete | 1 | All |
62 | 89-3150 | Pawl, right | 1 | All |
63 | 89-3146 | Pawl carrier plate complete | 1 | All |
64 | 89-3142 | Actuating plate complete | 1 | All |
65 | 89-3104 | Bush, gearbox side plate | 1 | 1949-56 S7 & S8 |
66 | 89-3140 | Cam plate central stud | 1 | All |
67 | 89-3118 | Kickstart return spring | 1 | All |
68 | 21-5102 | 1/4 nut BSF | 2 | All |
69 | 89-3122 | Locking strip | 1 | All |
70 | 89-3119 | Bearing, kickstart spindle | 1 | All |
71 | 89-5506 | Stud | 2 | All |
72 | 89-3120 | Thrust washer, kickstart spindle | 1 | All |
73 | 89-3117 | Distance piece, kickstart spindle | 1 | All |
74 | 89-3129 | Stop pin, kickstart quadrant | 1 | All |
75 | 89-3114 | Release plate, kickstart ratchet | 1 | All |
76 | 35-0033 | Washer, spring | 1 | All |
77 | 89-3115 | Ratchet release bolt | 1 | All |
78 | 89-3110 | Kickstart spindle & quadrant, complete | A | 1948 |
78 | 89-3113 | Kickstart spindle quadrant | 1 | All |
79 | 89-3121 | Retaining circlip, kickstart spindle | 1 | All |
80 | 89-3112 | Circlip, kickstart spindle | 1 | All |
81 | 89-3111 | Kickstart spindle | 1 | All |
82 | 89-3151 | Pawl, left | 1 | All |
83 | 89-3152 | Pawl spring | 1 | All |
84 | 89-3160 | Cam plate complete | 1 | 1948 |
84 | 89-3194 | Cam plate complete | 1 | 1949-56 S7 & S8 |
85 | 89-3190 | Connecting rod, gear indicator | 1 | All |
86 | 35-0719 | Split pin, big-end nut | 1 | 1949-56 S7 & S8 |
86 | 35-0719 | Split pin, big-end nut | 2 | 1948 |
87 | 89-3168 | Retaining circlip, cam plate | 1 | All |
88 | 89-3017 | Cup, layshaft bearing | 1 | 1949-56 S7 & S8 |
89 | 89-3023 | Bearing, 3/4×1 7/8×9/16 | 2 | All |
90 | 89-3060 | Speedo driving worm (solo ratio) | 1 | All |
90 | 89-3066 | Speedo driving worm (sidecar) | 1 | 1949-56 S7 & S8 |
91 | 89-3087 | Collar, speedo driving worm (1st and 4th speed) | 2 | 1949-56 S7 & S8 |
92 | 89-3055 | Layshaft gear bush (1st speed) | 1 | 1948 |
92 | 89-3085 | Layshaft gear bush (1st speed) | 1 | 1949-56 S7 & S8 |
93 | 89-3051 | Layshaft gear (1st speed) | 1 | 1948 |
93 | 89-3083 | Layshaft gear (1st speed) | 1 | 1949-56 S7 & S8 |
94 | 89-3058 | Layshaft splined hub | 1 | All |
95 | 89-3059 | Layshaft dog clutch | 2 | All |
96 | 89-3052 | Layshaft gear (2nd speed) | 1 | All |
97 | 89-3056 | Layshaft bush (2nd and 3rd speed) | 1 | All |
98 | 89-3053 | Layshaft gear (3rd speed) | 1 | All |
99 | 89-3049 | Layshaft, complete with gears | A | 1948 |
99 | 89-3050 | Layshaft | 1 | 1948 |
99 | 89-3082 | Layshaft | 1 | 1949-56 S7 & S8 |
100 | 89-0149 | Key | 1 | 1948 |
100 | 89-0149 | Key | 2 | 1949-56 S7 & S8 |
101 | 89-3057 | Layshaft bush (4th speed) | 1 | 1948 |
101 | 89-3086 | Layshaft bush (4th speed) | 1 | 1949-56 S7 & S8 |
102 | 89-3054 | Layshaft gear (4th speed) | 1 | 1948 |
102 | 89-3084 | Layshaft gear (4th speed) | 1 | 1949-56 S7 & S8 |
103 | 89-3208 | Gear change rubber | 1 | All |
104 | 89-3207 | Gearchange pedal | 1 | All |
105 | 89-3010 | Bush, gear indicator | 1 | 1949-56 S7 & S8 |
106 | 89-3205 | Oil seal, pedal shaft (internal) | 1 | All |
107 | 89-3204 | Gear indicator | 1 | All |
108 | 89-3206 | Oil seal, pedal shaft (external) | 1 | All |
109 | 89-3202 | Rubber, kickstart pedal | 1 | All |
110 | 89-3209 | Bolt, gearchange pedal | 1 | All |
111 | 89-0394 | Nut, 5/16″ BSF | 1 | All |
112 | 21-5668 | Bolt | 1 | All |
113 | 89-3228 | Oil level plug | 1 | All |
114 | 89-3231 | Washer, oil level plug | 1 | All |
115 | 89-3201 | Kickstart pedal | 1 | All |
116 | 89-3018 | Stud, exhaust pipe stay | 1 | 1949-56 S7 & S8 |
117 | 89-3007 | Bearing, kickstart spindle | 1 | 1949-56 S7 & S8 |
118 | 89-3008 | Oil seal, kickstart spindle | 1 | All |
119 | 02-2572 | Fibre washer | 1 | 1949-56 S7 & S8 |
119 | 89-3231 | Fibre washer | 1 | 1948 |
120 | 31-3066 | Gear box filler plug | 1 | 1949-56 S7 & S8 |
120 | 5-3/8″-1/2″ | Gearbox drain plug | 1 | 1948 |
121 | 89-3301 | Gearbox case with fixed fittings | 1 | 1949-56 S7 & S8 |
122 | 89-3015 | Stud, rear mounting plate | 2 | 1949-56 S7 & S8 |
123 | 89-3006 | Sprocket oil seal | 1 | All |
124 | 89-3076 | Layshaft coupling | 1 | 1948 |
124 | 89-3077 | Layshaft coupling | 1 | 1949-56 S7 & S8 |
125 | 35-0706 | Split Pin | 2 | 1948 |
125 | 35-0709 | Pin, shock absorber nut | 1 | All |
126 | 89-3079 | Nut, layshaft coupling | 1 | All |
127 | 89-3247 | Nut, 5/16″ BSF | 1 | All |
128 | 89-3246 | Fulcrum pin | 1 | All |
129 | 89-3245 | Clutch lever | 1 | All |
130 | 89-3258 | Clutch thrust plunger | 1 | 1949-56 S7 & S8 |
131 | 89-3244 | Retaining circlip | 1 | 1949-56 S7 & S8 |
132 | 89-3259 | Clutch thrust pad | 1 | 1949-56 S7 & S8 |
133 | 89-3242 | Ball bearing, 3/16 | 6 | 1949-56 S7 & S8 |
134 | 89-3261 | Spacer, clutch thrust bearing | 1 | 1949-56 S7 & S8 |
135 | 89-3260 | Washer, clutch thrust bearing | 1 | 1949-56 S7 & S8 |
136 | 86-1166 | Clutch adjustment chim (0.010″) | A | 1949-56 S7 & S8 |
136 | 86-0600 | Clutch adjustment chim (0.003″) | A | 1949-56 S7 & S8 |
136 | 82-3256 | Clutch adjusment shim | 2 | 1948 |
137 | 89-3262 | Clutch push rod with thrust pad | 1 | 1949-56 S7 & S8 |
138 | 89-3106 | Gasket, gearbox side plate | 1 | All |
139 | 89-3009 | Bush | 1 | 1949-56 S7 & S8 |
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